A N A M E R I C A N N A T I O N A L S T A N D A R D Steam Traps ASME PTC 39 2005 (Revision and Redesignation of ASME PTC 39 1 1980) Performance Test Codes ASME PTC 39 2005 (Revision and Redesignation[.]
ASME PTC 39-2005 (Revision and Redesignation of ASME PTC 39.1-1980) Steam Traps Performance Test Codes A N A M E R I C A N N AT I O N A L STA N DA R D ASME PTC 39-2005 (Revision and Redesignation of ASME PTC 39.1-1980) Steam Traps Performance Test Codes AN AMERICAN NATIONAL STANDARD Three Park Avenue • New York, NY 10016 Date of Issuance: November 11, 2005 This Code will be revised when the Society approves the issuance of a new edition There will be no addenda issued to ASME PTC 39-2005 ASME issues written replies to inquiries as code cases and interpretations of technical aspects of this document Code cases and interpretations are published on the ASME Web site under the Committee Pages at http://www.asme.org/codes/ as they are issued ASME is the registered trademark of The American Society of Mechanical Engineers This code or standard was developed under procedures accredited as meeting the criteria for American National Standards The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assume any such liability Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright © 2005 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A CONTENTS Notice Foreword Committee Roster Correspondence With the PTC 39 Committee Introduction v vi vii ix x 1 1 Section Definitions and Descriptions of Terms 2-1 General 2-2 Steam Trap 2-3 Capacity of a Steam Trap 2-4 Pressure 2-5 Inlet Subcooling 2-6 Subcooled Condensate 1 1 2 Section Guiding Principles 3-1 Items on Which Agreement Shall Be Reached 3-2 Qualifications of Person Responsible for the Test 3-3 Duties of Person Responsible for the Test 3-4 Procedures and Test Apparatus 3-5 Tests 3-6 Calibration of Instruments 3-7 Data Sources 3-8 Adjustments During Test 3-9 Records and Test Results 3-10 Calculations 2 2 2 2 2 Section Object and Scope 1-1 Scope 1-2 Object 1-3 Uncertainty Analysis Section Instruments and Methods of Measurement 4-1 General 4-2 Calibration of Instruments and Apparatus 4-3 Temperature 4-4 Pressure 4-5 Flow Measurements 4-6 Time Intervals 4-7 Steam Loss Tests 4-8 Condensate Capacity Tests 4-9 Air and Noncondensible Gas Removal Tests 3 3 3 4 12 Section Computation of Results 5-1 Correction of Measured Variables 5-2 Use of Formula Symbols 5-3 Steam Loss Calculations 16 16 16 16 Section Report of Test 6-1 General Information 6-2 Detailed Information 17 17 17 iii Section References 19 Figures Test Arrangement for Steam Loss Tests Condensate Capacity Test Arrangement Recommended Pressure Connection Air and Noncondensible Gas Handling Capability Test Arrangement 14 Forms Data Log for Steam Loss Tests: No Loads or Condensate Load Data Log for Capacity Test: Accumulator Level Measurement Calculation of Condensate Capacity Data Log for Intermittent Flow Capacity Test: Weigh Tank Measurement Calculation of Condensate Capacity: Weigh Tank Measurement Data Log for Intermittent Flow Capacity Test: Flowmeter Measurement Calculation of Condensate Capacity: Flowmeter Measurement Data Log for Air and Noncondensible Removal Test Steam Loss Test Calculations 10 11 12 13 14 15 18 Mandatory Appendix I Uncertainty Analysis 21 Nonmandatory Appendix A Conversion Tables 30 iv NOTICE All Performance Test Codes must adhere to the requirements of ASME PTC 1, General Instructions The following information is based on that document and is included here for emphasis and for the convenience of the user of the Code It is expected that the Code user is fully cognizant of Sections and of ASME PTC and has read them prior to applying this Code ASME Performance Test Codes provide test procedures that yield results of the highest level of accuracy consistent with the best engineering knowledge and practice currently available They were developed by balanced committees representing all concerned interests and specify procedures, instrumentation, equipment-operating requirements, calculation methods, and uncertainty analysis When tests are run in accordance with a Code, the test results themselves, without adjustment for uncertainty, yield the best available indication of the actual performance of the tested equipment ASME Performance Test Codes not specify means to compare those results to contractual guarantees Therefore, it is recommended that the parties to a commercial test agree before starting the test, and preferably before signing the contract, on the method to be used for comparing the test results to the contractual guarantees It is beyond the scope of any Code to determine or interpret how such comparisons shall be made v FOREWORD The Performance Test Codes Supervisory Committee, at its June 1974 Administrative meeting, authorized the formation of a Code Technical Committee to explore the possibility of writing a test code on condensate removal devices This committee was organized January 15, 1975 At its organizational meeting, the committee proposed the writing of two codes, PTC 39.1 on Condensate Removal Devices for Steam Systems and PTC 39.2 on Condensate Removal Devices for Air Systems This proposal was approved by the Performance Test Codes Supervisory Committee The Code for Condensate Removal Devices for Steam Systems was approved by the Performance Test Codes Supervisory Committee on April 1, 1980 It was further approved as an American National Standard by the ANSI Board of Standard Review on July 3, 1980 This committee has been operating as PTC 39 Steam Traps The original document was a compromise which had three sets of existing test equipment to be utilized We therefore satisfied the consensus standard The current document is generic and can fit other test platforms too The original publication was submitted without an uncertainty analysis Mr David Fisher of Armstrong Machine Works offered a magnificent theoretical treatise which is in our Appendix I It is a privilege to acknowledge the efforts of those who are currently not on the committee: Thomas Alesson, Datron Systems — Nicholson Division Warren Brand, Yarway Thomas W Carr, Jr., Spirax Sarco Inc Robert Collins, Watson Daniel Co Walter T Deacon, Armstrong Machine Works Keith Foley, Celanese Canada, Inc Robert W Henry, Salt River Project — Power Generation Systems Milton Hilmer, Sarco David Kalix, Yarway Corp William Mashburn, Virginia Polytechnic Institute and State University — Mechanical Engineering Department Elmer S Monroe, DuPont James W Murdock, Mechanical Engineering of Drexel University Richard G Obst, Spence Engineering Co., Inc./Nicholson Steam Trap William H Schilling, Schilling Associates Inc William F Sisson, Armstrong Machine Works Horst R Thieme, Watson McDaniel Co We are aware that the preferred SI unit for time is seconds However, the overwhelming customary unit in our industry is the capacity dimension of lb mass/hour We have chosen to not include the rigorous usage but continue that which is common usage ASME PTC 39-2005 was adopted by the American National Standards Institute as an American National Standard on May 5, 2005 vi PERFORMANCE TEST CODE COMMITTEE PTC 39 ON STEAM TRAPS (The following is the roster of the Committee at the time of approval of this Code.) COMMITTEE OFFICERS E F Gregg, Chair M A Brookes, Secretary COMMITTEE PERSONNEL S M Bisgrove, Spence Engineering Co., Inc M A Brookes, The American Society of Mechanical Engineers E F Gregg, Consulting Engineer M P Hellman, Armstrong International Inc D W Fischer, Alternate, Armstrong International Inc W E Johnston, WEJ Energy Management Specialists, Inc S J Korellis, Dynegy Midwest Generation A A Kornhauser, Virginia Tech vii BOARD ON PERFORMANCE TEST CODES OFFICERS J G Yost, Chair J R Friedman, Vice Chair S D Weinman, Secretary BOARD PERSONNEL P G Albert, General Electric Co R P Allen, Consultant J M Burns, Burns Engineering W C Campbell, Southern Co Services M J Dooley, Alstom Power A J Egli, Alstom Power J R Friedman, Siemens Westinghouse Power Corp G J Gerber, Praxair, Inc P M Gerhart, University of Evansville T C Heil, Consultant R A Johnson, Safe Harbor Water Power Corp T S Jonas, Tenaska, Inc D R Keyser, Information Network Systems, Inc S J Korellis, Dynegy Midwest Generation M P McHale, McHale & Associates, Inc P M McHale, McHale & Associates, Inc J W Milton, Environmental Systems, Corp S P Nuspl, Babcock & Wilcox, Inc A L Plumley, Plumley Associates R R Priestley, General Electric Co J A Rabensteine, Environmental Systems Corp J W Siegmund, Sheppard T Powell Associates J A Silvaggio, Jr., Siemens Demag Delaval Turbomachinery W G Steele, Jr., Mississippi State University S D Weinman, The American Society of Mechanical Engineers J C Westcott, Westcott Enterprises, Inc W C Wood, Duke Power Co J G Yost, Sargent & Lundy viii CORRESPONDENCE WITH THE PTC 39 COMMITTEE General ASME Codes are developed and maintained with the intent to represent the consensus of concerned interests As such, users of this Code may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings Correspondence should be addressed to: Secretary, PTC 39 Standards Committee The American Society of Mechanical Engineers Three Park Avenue New York, NY 10016-5990 Proposing Revisions Revisions are made periodically to the Code to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Code Approved revisions will be published periodically The Committee welcomes proposals for revisions to this Code Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation Interpretations Upon request, the PTC 39 Committee will render an interpretation of any requirement of the Code Interpretations can only be rendered in response to a written request sent to the Secretary of the PTC 39 Standards Committee The request for interpretation should be clear and unambiguous It is further recommended that the inquirer submit his/her request in the following format: Subject: Edition: Question: Cite the applicable paragraph number(s) and the topic of the inquiry Cite the applicable edition of the Code for which the interpretation is being requested Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation The inquirer may also include any plans or drawings which are necessary to explain the question; however, they should not contain proprietary names or information Requests that are not in this format will be rewritten in this format by the Committee prior to being answered, which may inadvertently change the intent of the original request ASME procedures provide for reconsideration of any interpretation when or if additional information that might affect an interpretation is available Further, persons aggrieved by an interpretation may appeal to the cognizant ASME Committee or Subcommittee ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity Attending Committee Meetings The PTC 39 Standards Committee regularly holds meetings, which are open to the public Persons wishing to attend any meeting should contact the Secretary of the PTC 39 Standards Committee ix